Sea Water Intrusion into the Fraser River and its Relation to the Incidence of Shipworms in Steveston Cannery Basin

1958 ◽  
Vol 15 (1) ◽  
pp. 91-113 ◽  
Author(s):  
Susumu Tabata ◽  
Robin J. LeBrasseur
Keyword(s):  
River Discharge ◽  
Sea Water ◽  
Salt Water ◽  
Larval Settlement ◽  
River Estuary ◽  
River Channel ◽  
Fraser River ◽  
Sea Water Intrusion ◽  
Factors Affecting ◽  
Water Intrusion

The presence of shipworms (Bankia setacea) in Steveston Cannery Basin in the Fraser River estuary is attributed to sea water intrusion. River discharge, tides, geometry of the river channel and basin, and density of the intruding sea water are factors affecting intrusion, which in turn influence larval settlement. Settlement may occur at depths where salinity is less than 15‰ but the larvae fail to survive. However, they will continue to develop where salinity exceeds 20‰. Dredging the channel to a continuous grade would eliminate permanent salt-water "pools" along the bottom and prevent infestation.

Control of sea-water intrusion by salt-water pumping: Coast of Oman

2009 ◽  
Vol 17 (3) ◽  
pp. 541-558 ◽  
Author(s):  
A. R. Kacimov ◽  
M. M. Sherif ◽  
J. S. Perret ◽  
A. Al-Mushikhi
Keyword(s):  
Sea Water ◽  
Salt Water ◽  
Sea Water Intrusion ◽  
Water Intrusion ◽  
Water Pumping

scholarly journals Prediksi Intrusi Air Laut Berdasarkan Nilai Daya Hantar Listrik dan Total Dissolved Solid di Kabupaten Tangerang

2019 ◽  
Vol 8 (4) ◽  
pp. 243
Author(s):  
Roh Santoso Budi Waspodo ◽  
Silvia Kusumarini ◽  
Vita Ayu Kusuma Dewi
Keyword(s):  
Sea Water ◽  
Salt Water ◽  
Primary Data ◽  
Negative Slope ◽  
Salt Water Intrusion ◽  
Sea Water Intrusion ◽  
Water Intrusion ◽  
Observation Area ◽  
Measurement Results ◽  
Total Dissolved Solid

Intrusion of sea water is the infiltration of sea water into the soil. This might be caused by a groundwater excessive exploration. Tangerang District is one of the areas that have great potential sea water intrusion. The aim of research was to predict the limit of salt water intrusion based on the value of DHL and TDS. The primary data were measured using a TOA EC meter CM-14P and then were processed using Surfer 9.0 software and ArcGIS. The measurement results was compared with PAHIAA Decision (1986) and Carroll’s Classification (1962). The results showed that the intrusion area could be identified by DHL and TDS values. On the area located far from the beach, intrusion was influenced by the presence of a river in the region. This was indicated by the regression analysis that showed a correlation between distance and value DHL/TDS with a negative slope value. Based on DHL and TDS parameters in observation area, the groundwater conditions in  Tangerang District within a radius of 0.095 km to 5 km from the littoral areas are categorized as medium intrusion zone (slightly brackish water) with DHL 1500-1999 μmhos/cm and TDS values 1000-3000 mg/LU.

Saline water intrusion adjacent to the Fraser River, Richmond, British Columbia

2001 ◽  
Vol 38 (1) ◽  
pp. 67-82 ◽  
Author(s):  
Laurie Neilson-Welch ◽  
Leslie Smith
Keyword(s):  
Dynamic Equilibrium ◽  
Saline Water ◽  
Salt Water ◽  
Ground Surface ◽  
River Channel ◽  
Low Flow ◽  
Salt Water Intrusion ◽  
Fraser River ◽  
Water Intrusion ◽  
River Bed

During periods of average to low flow in the Fraser River, seawater from Georgia Strait migrates with a rising tide up the river channel, reaching distances up to 16 km from the river's outlet to the ocean. This relatively dense water infiltrates through the river bed and circulates as a stable wedge of saline water within permeable deltaic deposits adjacent to the river. At the Kidd2 site in Richmond, the wedge extends approximately 500 m inland from the river. The top of the transition zone between fresh and saline water is 10 m below ground surface. The bottom of the saline wedge is located at the contact with underlying low-permeability delta slope deposits, resulting in a wedge with a vertical extent of approximately 10 m. Maximum salinity values observed in the wedge (16–17 parts per thousand) reflect the time-averaged response to density-driven flow under a complex sequence of daily and seasonal variations in salinity within the Fraser River and mixing with fresh river water that may enter the aquifer during the summer freshet. Under the assumption of dynamic equilibrium, simulation of the saline wedge at the Kidd2 site suggests (1) the effective, long-term average salinity at the base of the river channel is approximately 19 parts per thousand; (2) the velocity of groundwater, directed inland in the central portion of the wedge, is in the range from 0.5 to 6 m/year; and (3) fresh water in the confined deltaic sands moves from inland areas toward the Fraser River under a hydraulic gradient of approximately 3 × 10–4.Key words: salt water intrusion, deltaic sediments, modeling.

Sea water intrusion and salt water intrusion in the coastal area of Laizhou Bay

1998 ◽  
Vol 43 (12) ◽  
pp. 983-992 ◽  
Author(s):  
Xue Yuqun ◽  
Wu Jichun ◽  
Xie Chunhong ◽  
Zhang Yongxiang
Keyword(s):  
Coastal Area ◽  
Sea Water ◽  
Salt Water ◽  
Salt Water Intrusion ◽  
Laizhou Bay ◽  
Sea Water Intrusion ◽  
Water Intrusion

scholarly journals Assessment of Sea Water Intrusion in Muthupettai Block

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
B. Pavithra ◽  
M. Renganathan
Keyword(s):  
Tamil Nadu ◽  
Artificial Recharge ◽  
Sea Water ◽  
Salt Water ◽  
Coastal Region ◽  
Geographical Information ◽  
Salt Water Intrusion ◽  
Mixing Index ◽  
Sea Water Intrusion ◽  
Water Intrusion

<div><p><em>Salt water intrusion into coastal aquifers is potentially a major problem in the coastal region of Muthupettai block in Thiruthuraipoondi taluk (Thiruvarur District, Tamil Nadu), hence in order to assess the vulnerability area, ground water study should be done. By the water quality variations sea water mixing index is assessed. Seawater mixing index is used to describe the vulnerability area and the extension of intrusion over the study area. Thematic maps of factors influencing the sea water intrusion were prepared and overlaid using Geographical Information System (GIS). By the vulnerability mapping, the suitable area for the remediation technique of sea water intrusion that should be practiced in the study area will be decided. Rain water harvesting and artificial recharge techniques are more useful as a tool in remediation of salt water intrusion. Estimation of surplus run-off is also very important in planning artificial recharge schemes.</em></p></div>

Investigational Studies on Quantity of Salinity in Netravati River Estuary Sand-Coastal Karnataka

2018 ◽  
Vol 6 (6) ◽  
pp. 46
Author(s):  
Raveesha P ◽  
K. E. Prakash ◽  
B. T. Suresh Babu
Keyword(s):  
Brackish Water ◽  
Sea Water ◽  
Salt Water ◽  
Construction Material ◽  
Salt Content ◽  
River Estuary ◽  
Sand Sample ◽  
River Sand ◽  
Natural Aggregates

The salt water mixes with fresh water and forms brackish water. The brackish water contains some quantity of salt, but not equal to sea water. Salinity determines the geographic distribution of the number of marshes found in estuary. Hence salinity is a very important environmental factor in estuary system. Sand is one major natural aggregate, required in construction industry mainly for the manufacture of concrete. The availability of good river sand is reduced due to salinity. The quality of sand available from estuarine regions is adversely affected due to this reason. It is the responsibility of engineers to check the quality of sand and its strength parameters before using it for any construction purpose. Presence of salt content in natural aggregates or manufactured aggregates is the cause for corrosion in steel. In this study the amount of salinity present in estuary sand was determined. Three different methods were used to determine the salinity in different seasonal variations. The sand sample collected nearer to the sea was found to be high in salinity in all methods.  It can be concluded that care should be taken before we use estuary sand as a construction material due to the presence of salinity.

scholarly journals Groundwater Monitoring Systems to Understand Sea Water Intrusion Dynamics in the Mediterranean: The Neretva Valley and the Southern Venice Coastal Aquifers Case Studies

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 561
Author(s):  
Ivan Lovrinović ◽  
Alessandro Bergamasco ◽  
Veljko Srzić ◽  
Chiara Cavallina ◽  
Danko Holjević ◽  
...  
Keyword(s):  
Real Time ◽  
Coastal Aquifers ◽  
Sea Water ◽  
Quantitative Information ◽  
Water Dynamics ◽  
Monitoring Systems ◽  
Driving Mechanism ◽  
Sea Water Intrusion ◽  
Water Intrusion ◽  
Aquifer Systems

Sea water intrusion (SWI) has been widely recognized as a global problem, significantly influencing coastal aquifers, mostly through reduced water quality and agricultural production indicators. In this paper, we present the outcomes of the implementation of two independent real-time monitoring systems, planned and installed to get insights on groundwater dynamics within the adjacent coastal aquifer systems, one located in the Neretva Valley, southeastern Croatia, the other located south of the Venice lagoon, northeastern Italy. Both systems are presented with technical details and the capacity to observe, store, and transmit (Neretva site) observed values in real-time. Analysis of time series reveals the significant influence of the sea level oscillations onto the observed groundwater electrical conductivity (EC) and piezometric head values, while precipitation rate is detected as a driving mechanism for groundwater parameters in shallow geological units. The installed monitoring systems are shown to be of great importance to provide qualitative and quantitative information on the processes influencing groundwater and surface water dynamics within two coastal systems.

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